I am having a strange problem with org-mode. When I update/change a linked image it does not update in the buffer.
My test uses babel for convenience, but this is true for all images. I already have the following set:
(add-hook 'org-babel-after-execute-hook 'org-redisplay-inline-images)
When I run the following, I see a plot image as expected.
#+BEGIN_SRC R :results output graphics file :file test.png
plot(1:2, 1:2, type='p')
abline(h=1,lty=2)
abline(v=1.5)
#+END_SRC
But when I change the plotting code (by commenting out one of the abline commands), the displayed result image doesn't update.
It's as if emacs has cached the image, but I cannot find any way to clear that cache.
It may caused by emacs image cache. Add (add-hook 'org-babel-after-execute-hook 'clear-image-cache) works for me.